1 minute ago, Budgernaut said:

Orcs seem to be more bumbling and silly than Uthuk, though I think both are vicious in battle. I would explain the Uthuk Y'llan as being blood-thirsty, demon-tainted, human barbarians.

In Disk Wars the Orcs and Uthuk both had access to a lot of Berserk.

Orcs had goblins, who were a bit more comical and sneaky of course. Uthuk had a bit more technology and were actually more suicidal, they focused a lot on sacrifice mechanics.

They had demonic magic, Orcs were more shamans.

2 hours ago, Budgernaut said:

Orcs seem to be more bumbling and silly than Uthuk, though I think both are vicious in battle. I would explain the Uthuk Y'llan as being blood-thirsty, demon-tainted, human barbarians.

I'd say this could be summed up further as "demonic human barbarians" (reinforced by other demonic forces), just like Waiqar's troops are "undead human soldiers" (reinforced by other undead forces).

Actually, the orcs in the setting are very interesting to me. They have some interesting fluff, like being the source of the spirit speakers, having no native word for "half measure" and being ruthless in war. The Uthuk are different than the orcs in that they use less tactics and more brute force and sacrifice. Orcs aren't about demons, and they aren't bumbling in this fluff.